floss: Fix RNR Command Disallowed error in discovery classic only mode

Bluetooth controller would reject Remote Name Request if it's in
inquiry mode. This patch fixes RNR Command Disallowed error by
starting RNR after the Inquiry Complete event.

Bug: 277977567
Tag: #floss
Test: Manual - No Command Disallowed error for RNR
Change-Id: I4297bca6578b0a3b1b9f5672dfd8fb6c8a2b18e4